What Joe said about putting the hands on bottom of wheel... pull left to turn left etc. Another thing that will help, get walkie talkies or just use cell phones. In other words, avoid yelling at each other from the windows; it simply entertains other campers while you feel more frustrated.
With the walkie talkie, One of you backs up while the other is in the back to direct (pull left/right, 5 more feet, straight back, water is lined up, 5 feet away from dump/ etc). Imprerative to the guy/girl/kid to know is to push the talk button and count 1001, 1002... then talk! Team work is great. Talk calm. See where you are. Look at each other making eye contact and smile (kiss comes later). Congratulations for getting this far. now try to add blocks under the tires (always re chalk tires if you move tt to level.It's team process. You will get it. Determination gets you there. Pick a WalMart parking lot just so you can stay over night and let all this fit in.
One other thing, take your first "weekend" day and hook up. Go to a large parking lot local to you. Practice backing/turning/etc. Take time to unhook but make sure to chalK tires on the downside!. At some point even with our truck in nuetral to loosen pressure on ball (then put back in park!) Don has still had to get on bumper and bounce up and down.... LOL he looks funny doing it (hmmm Kodak moment for the funny pics thread maybe). At any rate, check out the youtube site that Joe recommended. Hook up and head to a flat parking lot to practice that which initmidates you. Many newbies before you have done the same thing! I wish we lived close to help you, but with practice you guys will get it!
Of course, you will need to gas up....find gas station that allow you to go straight forward out away from others if possible. Drive in straight. But when you have to pull out, know taht you have to pull the tt sraight out from pumps and make a wide turn.. Take your time. If you turn wide, you clear.... if not... get those walkie/talkies or cellphones and start talking to back up (we're still experienced but did have to do a pull back with Don on the radio behind me (I drive)... tite gas station).
Give it practice. Anticipate these situations in the parking lot. Imagine pulling into the gas station, pull throug cg, back in cg.... Take a deep breath. When all is done, take a deep breath and have that bottle of wine ready (as long as you are parked that is)!